{1}, {T}, Sacrifice Astrolabe: Add two mana of any one color. Draw a card at the beginning of the next turn's upkeep.

When Banewhip Punisher enters the battlefield, you may put a -1/-1 counter on target creature.

{B}, Sacrifice Banewhip Punisher: Destroy target creature that has a -1/-1 counter on it.

Flying

{7}{B}, {T}, Sacrifice Blight Keeper: Target opponent loses 4 life and you gain 4 life.

{T}: Add {C}.

{3}{G}, {T}, Sacrifice Blighted Woodland: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

You may have Body Double enter the battlefield as a copy of any creature card in a graveyard.

{1}, {T}, Sacrifice a creature: You gain 4 life.

{1}, {T}, Sacrifice a creature named Festering Newt: Each opponent loses 4 life. You gain life equal to the life lost this way.

{T}: Add {U}. Cephalid Coliseum deals 1 damage to you.

Threshold -- {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

Reveal the top five cards of your library. You may put a creature or enchantment card from among them into your hand. Put the rest into your graveyard.

At the beginning of your upkeep, you may mill two cards.

Whenever one or more land cards are put into your graveyard from anywhere for the first time each turn, create a 1/1 green Insect creature token.

At the beginning of your upkeep, you may mill a card.

Delirium -- {2}{G}, Sacrifice Crop Sigil: Return up to one target creature card and up to one target land card from your graveyard to your hand. Activate only if there are four or more card types among cards in your graveyard.

Target creature gets -1/-1 until end of turn.

Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

{G}, Sacrifice Dawntreader Elk: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Flash

Whenever a creature you control dies, each opponent sacrifices a creature.

Surveil 2, then draw a card. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

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Each opponent returns a nonland permanent they control with the highest mana value among permanents they control to its owner's hand, then discards a card.

When Festering Newt dies, target creature an opponent controls gets -1/-1 until end of turn. That creature gets -4/-4 instead if you control a creature named Bogbrew Witch.

{1}{G}, Sacrifice Font of Fertility: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{1}{U}, Sacrifice Font of Fortunes: Draw two cards.

{B}, {T}, Sacrifice another creature: Create X 2/2 black Zombie creature tokens, where X is the sacrificed creature's power.

Creatures your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof.

{3}, Sacrifice Glaring Spotlight: Creatures you control gain hexproof until end of turn and can't be blocked this turn.

When Golgari Thug dies, put target creature card from your graveyard on top of your library.

Dredge 4 (If you would draw a card, you may mill four cards instead. If you do, return this card from your graveyard to your hand.)

Reveal the top five cards of your library. You may put a creature or land card from among them into your hand. Put the rest into your graveyard.

{T}, Sacrifice a creature: Return target creature card from your graveyard to the battlefield. Activate only during your upkeep.

Inspired -- Whenever King Macar, the Gold-Cursed becomes untapped, you may exile target creature. If you do, create a Gold token. (It's an artifact with "Sacrifice this artifact: Add one mana of any color.")

During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard. (If a card has multiple permanent types, choose one as you play it.)

Flying

When Mulldrifter enters the battlefield, draw two cards.

Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

You may cast Necromancy as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.

When Necromancy enters the battlefield, if it's on the battlefield, it becomes an Aura with "enchant creature put onto the battlefield with Necromancy." Put target creature card from a graveyard onto the battlefield under your control and attach Necromancy to it. When Necromancy leaves the battlefield, that creature's controller sacrifices it.

Flying

When Nevermaker leaves the battlefield, put target nonland permanent on top of its owner's library.

Evoke {3}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Flash

Enchant creature

Whenever enchanted creature is dealt damage, its controller loses that much life.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

When Shriekmaw enters the battlefield, destroy target nonartifact, nonblack creature.

Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Create a 1/2 green Spider creature token with reach for each creature card in your graveyard.

Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Whenever combat damage is dealt to you or a planeswalker you control, if Vengeful Pharaoh is in your graveyard, destroy target attacking creature, then put Vengeful Pharaoh on top of your library.

Flying

As long as Wonder is in your graveyard and you control an Island, creatures you control have flying.

{T}: Choose a creature card name. Reveal the top four cards of your library and put all of them with that name into your hand. Put the rest into your graveyard.